Line data    Source code

       1             : /* SPDX-License-Identifier: GPL-2.0-or-later */
       2             : /*
       3             :  * INET         An implementation of the TCP/IP protocol suite for the LINUX
       4             :  *              operating system.  INET is implemented using the  BSD Socket
       5             :  *              interface as the means of communication with the user level.
       6             :  *
       7             :  *              Definitions for the IP protocol.
       8             :  *
       9             :  * Version:     @(#)ip.h        1.0.2   04/28/93
      10             :  *
      11             :  * Authors:     Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
      12             :  */
      13             : #ifndef _LINUX_IP_H
      14             : #define _LINUX_IP_H
      15             : 
      16             : #include <linux/skbuff.h>
      17             : #include <uapi/linux/ip.h>
      18             : 
      19        6727 : static inline struct iphdr *ip_hdr(const struct sk_buff *skb)
      20             : {
      21        6678 :         return (struct iphdr *)skb_network_header(skb);
      22             : }
      23             : 
      24           0 : static inline struct iphdr *inner_ip_hdr(const struct sk_buff *skb)
      25             : {
      26           0 :         return (struct iphdr *)skb_inner_network_header(skb);
      27             : }
      28             : 
      29             : static inline struct iphdr *ipip_hdr(const struct sk_buff *skb)
      30             : {
      31             :         return (struct iphdr *)skb_transport_header(skb);
      32             : }
      33             : 
      34           0 : static inline unsigned int ip_transport_len(const struct sk_buff *skb)
      35             : {
      36           0 :         return ntohs(ip_hdr(skb)->tot_len) - skb_network_header_len(skb);
      37             : }
      38             : #endif  /* _LINUX_IP_H */